fire-bomber vs pyro

fire-bomber

pyro

adj

  • Pyrotechnic. 

  • Pyromaniac, pyromaniacal. 

noun

  • Pyrotechnics. 

  • Pyrotechnician. 

  • A pyromaniac. 

  • Pyrocellulose. 

How often have the words fire-bomber and pyro occurred in a corpus of books? (source: Google Ngram Viewer )